TONEPROS - https://tonepros.com/products-main/
GOTOH - https://g-gotoh.com/?lang=en
FLOYD ROSE - https://es.floydrose.com/?utm_campaign=hp_r&utm_source=https://www.floydrose.com&utm_medium=wi_proxy&utm_content=en_US&utm_term=b
SCHALLER - https://schaller.info/en
BABICZ - https://www.fullcontacthardware.com/
VEGATREM - https://vegatrem.com/es/
FABER - https://www.faberguitar.com/
GROVER - https://grotro.com/product-category/companies/grover-musical-products/
GRAPH TECH - https://graphtech.com/
ABM - https://abm-guitarpartsshop.com/index.php?language=en
GÖLDO - https://www.goeldo.de/
KAHLER - https://kahlerusa.com/
HIGHWOOD GUITAR PARTS - https://www.highwood-guitarparts.com/?gclid=EAIaIQobChMIttqvgbzQ-gIVIe7mCh3_iQTREAAYASAAEgLfHPD_BwE
RAW VINTAGE - http://rawvintage.com/eng/index.php
ALLPARTS - https://www.allparts.com/